打算趁留在学校的最后一段时间好好补习一下一直以来都忽略掉的C/C++标准库，大概就是以头文件为单位了。以一个最简单的头文件入手，然后逐渐展开来……第一个头文件当然非assert.h莫属了。这个范例是i386-pc-mingw32中的GCC 4.5.0下包含的。
view sourceprint /*
* assert.h
* This file has no copyright assigned and is placed in the Public Domain.
* This file is a part of the mingw-runtime package.
* No warranty is given; refer to the file DISCLAIMER within the package.
*
* Define the assert macro for debug output.
*
*/
/* We should be able to include this file multiple times to allow the assert
macro to be enabled/disabled for different parts of code. So don't add a
header guard. */
#ifndef RC_INVOKED
/* All the headers include this file. */
#include <_mingw.h>
#undef assert
#ifdef __cplusplus
extern "C" {
#endif
#ifdef NDEBUG